The elapsed timer also has a
“count-down” mode. To enter the
countdown mode, the SET/RST button
is depressed for about two seconds, or
until the “ET” annunciation begins to
flash. It is now in the ET set mode, and
a time up to 59 minutes, 59 seconds
may be preset into the elapsed timer
with the concentric knobs. The preset
time will be displayed and remain
unchanged until SET/RST is pressed
again, which will start the elapsed timer
counting down from the preset time.
When the timer reaches :00 it will start
to count up as the display flashes for
15 seconds and an aural alarm, if
installed, is activated for about 1 second.
NOTE: The standby frequency which is
in memory while flight time or elapsed
time modes are being displayed may be
called back by pressing the FRQ button,
then transferred to active use by pressing
the FRQ button again.
While FLT or ET is displayed the “in
use” frequency on the left side of the
window may be changed, by using the
frequency select knobs, without any
effect on the stored standby frequency
or the other modes. This feature is
especially useful when searching for
stations with unknown frequencies.
The elapsed timer also has a “count-down” mode. To enter the countdown mode, the SET/RST button is depressed for about two seconds, or until the “ET” annunciation begins to flash. It is now in the ET set mode, and a time up to 59 minutes, 59 seconds may be preset into the elapsed timer with the concentric knobs. The preset time will be displayed and remain unchanged until SET/RST is pressed again, which will start the elapsed timer counting down from the preset time. When the timer reaches :00 it will start to count up as the display flashes for 15 seconds and an aural alarm, if installed, is activated for about 1 second. NOTE: The standby frequency which is in memory while flight time or elapsed time modes are being displayed may be called back by pressing the FRQ button, then transferred to active use by pressing the FRQ button again. While FLT or ET is displayed the “in use” frequency on the left side of the window may be changed, by using the frequency select knobs, without any effect on the stored standby frequency or the other modes. This feature is especially useful when searching for stations with unknown frequencies.